Introduction

Requirements for removable media storage devices (RMSDs) used with personal computers have changed significantly since the introduction of the floppy disk in 1971. At one time, desktop computers depended on floppy disks for all of their storage requirements. Even with the advent of multigigabyte hard drives, floppy disks and other RMSDs are still an integral part of most computer systems, providing.

? Transport between computers for data files and software
? Backup to preserve data from the hard dive
? A way to load the op ....etc

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It is an optical disc technology in the infant state of research, that utilizes the revolutionary collinear holography technique that has one red laser and one blue-green laser collimated into a single beam. The data that is programmed as laser interference fringes from a holographic layer at the top of the disc is read by the blue-green laser where as the servo information from the common CD style aluminum layer near the bottom is read by the red laser, which is used as the reference beam. This disc capable of storing 3.9 terabytes of data als ....etc

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he cried and i cried. i told him i needed him, so he had to hang in there. and then i woke up..
If you like his girlfriend don't be mean and try to break them up though. For this step you must be a complete girly girl. Twirl your hair or braid it when your bored in class.
Deposits are formed in ultrabasic rocks, rich in magnesium, by the action of hydrothermal solutions connected with younger granites. In the USSR chrysotile asbestos is mined in the Urals (the Bazhenov and Kiembaev deposits), the western part of Kazakhstan (Dzhetygarina), ....etc

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Optical disks share a major part among the secondary storage devices.Blu .ray Disc is a next .generation optical disc format. The technology utilizes a blue laser diode operating at a wavelength of 405 nm to read and write data. Because it uses a blue laser it can store enormous more amounts of data on it than was ever possible.
Data is stored on Blu .Ray disks in the form of tiny ridges on the surface of an opaque 1.1 .millimetre .thick substrate. This lies beneath a transparent 0.1mm protective layer. With the help of Blu .ray recording dev ....etc

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please send the doccument and ppt's about the seminar topic Blue ray ,and also send some latest seminar topics for final semester electronics & communication seminar to my id [email protected] you do the needful.

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Optical discs are the preferred media for storing and distributing digital information, especially software. The pervasive use of these discs in motivated by their low cost coupled with their versatility and durability. But advances in circuit technology have also boosted software piracy by making it easy to create high-fidelity copies of optical discs. Thor is a security scheme that aims to prevent unauthorized disc duplication and any illegal use of the data. Thor relies on a combination of software and hardware strategies using time-tested c ....etc

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Definition
Holographic Versatile Disc (HVD) is an optical disc technology still in the research stage, which would greatly increase storage over Blue-Ray and HD DVD optical disc systems. It employs a technique known as collinear holography, whereby two lasers, one red and one blue-green, are collimated in a single beam.Current optical storage saves one bit per pulse, and the HVD alliance hopes to improve this efficiency with capabilities of around 60,000 bits per pulse. The HVD has a transfer rate of 1 gigabit/sec. ....etc

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